Mine came with the same generic cover every model manual. On the barrel it has 5.56 NATO 1-9. The second AR I have is one I built with M&P lower and DPMS barrel and upper receiver, Bushmaster stock, DPMS trigger group, so it has no manual. Never fired either yet. The one I bought whole is the 15X, but just dry firing them, the DPMS trigger group is slightly smoother and crisp.
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